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Genus Pteronarcys - Giant Stoneflies


The information below is based on images submitted and identified by contributors. Range and date information may be incomplete, overinclusive, or just plain wrong.

Contributed Images Map No Images   Images
Range map for Giant Stoneflies

Hover over black occurrence boxes to see number of images submitted. Log in to make states, months and boxes clickable.
JanFebMarAprMayJunJulAugSepOctNovDec
Alabama  4         
Alberta   193      
Arizona       1    
British Columbia2 2 3 2     
California   6352    2
Colorado 5   1      
Georgia   3        
Idaho    116     
Indiana   1        
Iowa   529 1    
Kentucky    1       
Maryland   24       
Massachusetts   2 1      
Michigan     1      
Minnesota    11      
Missouri      1     
Montana  1 4343  1 
Nebraska   1        
New Brunswick     3    2 
New Hampshire   213 32   
New Jersey     1      
New York    7       
North Carolina    1       
Ontario     3   2  
Oregon  11235    1 
JanFebMarAprMayJunJulAugSepOctNovDec
Pennsylvania   22       
Quebec     1      
Saskatchewan     2      
Tennessee   41       
Vermont  23751     
Virginia2510443 469136
Washington   1133      
Wisconsin    52      
Wyoming      321   
Yukon Territory      23